package com.wanxi.date;

import java.util.Date;

public class MyDate {
    public static void main(String[] args) {
//        System.out.println(System.currentTimeMillis());
        StringBuffer stringBuffer=new StringBuffer("asdfgg");
        stringBuffer.insert(2,"123");
        System.out.println(stringBuffer);
//        stringBuffer.append("aaaaaa",2,4);
//        for (int i = 0; i < 100000; i++) {
//           stringBuffer.append(i);
//        }
        System.out.println(System.currentTimeMillis());

    }
    public static void aa(){
        long ri = 1575465416955L;
        Date date = new Date(ri);
//        date.setHours();
    }
}
